Huperzia hamiltonii  

Stems dichotomous branching, pendulous, 7.5-15 cm long, 0.9-1.5 in diameter near base.  Leaves ascending, subadnate, rarely subpatent, sometimes twisted, lanceolate, apex acute to acuminate, broadest near middle or lower part, sessile to very short stalk, 6.4-9.5 mm long, 1,4-2,2 mm wide, entire; vein less distinct; texture softly chartaceous to thicker, green to yellowish green. Strobili slightly thinner than sterile part, not columniform, terminal on branches, 1.5-5.7 cm long, 0,4-1.1 in diameter; sporophylls usually smaller than tropophylls, up to 6 mm long, 0.8-1.2 mm wide, Sporangia yellowish, reniform, vertically bisected ca. 1 mm long and wide.

Thailand. — NORTHERN: Chiang Rai (Doi Chiang Dao, Khun Mae Lan, Khun Kong San, Doi Suthep, Doi Inthanon), Mae Hong Son (Doi Khun Hui Pong), Phitsanulok (Phu Miang) Phetchanun (Phu Thap Boek); NORTH-ESTERN: Loei (Phu Luang); CENTRAL: Nakhon Nayok (Khao Yai); South-eastern Chantaburi (Khao Soi Doa); SOUTH-WESTERN: Kanchanaburi (Sisawat); PENINSULAR: Nakhon Si Thammarat (Khao Luang).

Distribution. — Himalaya (type) to S. China and Japan also in Indochina and Taiwan.

Ecology. — On mossy tree trunks or mossy rocks at 1,600 m alt.

Specimens examined. — K.PUNCHAY 002, 132, 273 (BCU); T. SMITINUND 2481(BKF).